XML 29 R73.htm IDEA: XBRL DOCUMENT v2.4.1.9
Income Taxes - Operating Loss Carryforwards (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Operating Loss Carryforwards [Line Items]    
Unremitted foreign earnings in deferred tax liabilities $ 15.7us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings $ 0us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
Unremitted foreign earnings in deferred tax liabilities to be offset by net operating losses 14.1imn_DeferredTaxLiabilitiesUndistributedForeignEarningsOffsetbyNetOperatingLosses  
Unremitted foreign earnings in deferred tax liabilities related to foreign tax withholding 1.6imn_DeferredTaxLiabilitiesUndistributedForeignEarningsRelatedtoForeignTaxWithholding  
Federal    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 348.5us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityNameAxis
= us-gaap_InternalRevenueServiceIRSMember
 
U.S. and Foreign    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforwards 33.9us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= imn_USAndForeignMember
 
U.S. and Foreign | 2015 to 2017    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforwards 7.6us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= imn_USAndForeignMember
/ us-gaap_TaxPeriodAxis
= imn_Between2015and2017Member
 
U.S. and Foreign | 2018 to 2032    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforwards 23.9us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= imn_USAndForeignMember
/ us-gaap_TaxPeriodAxis
= imn_Between2018and2032Member
 
U.S. and Foreign | Indefinite    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforwards 2.4us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= imn_USAndForeignMember
/ us-gaap_TaxPeriodAxis
= imn_IndefiniteMember
 
State and Local Jurisdiction    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 383.9us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
 
State and Local Jurisdiction | 2015 to 2017    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 2.3us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ us-gaap_TaxPeriodAxis
= imn_Between2015and2017Member
 
Foreign Tax Authority    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 35.3us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
 
Foreign Tax Authority | 2015 to 2017    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 0.3us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
/ us-gaap_TaxPeriodAxis
= imn_Between2015and2017Member
 
Foreign Tax Authority | Indefinite    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 32.6us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
/ us-gaap_TaxPeriodAxis
= imn_IndefiniteMember
 
Foreign Tax Authority | Various dates up to 2024    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 2.4us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
/ us-gaap_TaxPeriodAxis
= imn_TaxYear2024Member
 
Capital Loss Carryforward | Federal | 2019    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforwards $ 30.1us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityNameAxis
= us-gaap_InternalRevenueServiceIRSMember
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_CapitalLossCarryforwardMember
/ us-gaap_TaxPeriodAxis
= imn_TaxYear2019Member